All you need is a Komplement shoebox and a wire coathanger.
A pair of pliers and a craft knife will be needed aswell...
I promise to get some better photos - Unfortunately the uploading is hit and miss with the neighbours internet...
Step 1: Cut the Hanger
*Note, I had forgotten how tough coathangers can be, I bent my little wire cutting pliers handles before switching to beefier pliers, best bet would be to use a little hacksaw so you don't damage smaller pliers by leaving a big notch on the blades, though that little notch is handy for stripping small gauge wire...
Step 2: Make the Slits
Step 3: Slide the Rails in to Place
Step 4: Hang It Up
As a safety note I would say only use this with CFL bulbs, though the fabric-plastic is tough it might be meltable in the heat of an incandescent bulb.
For extra light you could slice one of the bottom layers to get more light below it.